A blink typically lasts 100-150 milliseconds.

A blink typically lasts 100-150 milliseconds

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Even if no one in the past few generations of your family had blue or

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Blind people can see their dreams as long as they weren’t born blind

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While reading a page of print the eyes do not move continually across

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Your eyes are comprised of rods and cones. Rods allow you to see shapes,

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The first blue-eyed person is said to have lived 6,000-10,000 years ago

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There is enough iron in your body to make a nail 8cm long!